<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
    <title>Title</title>
</head>
<body>
<style>
    .container {
        width: 300px;
        margin: 0 auto;
    }
    .title {
        font-size: 30px;
        color: #ff4d37;
    }
    .result {
        display: none;
    }
</style>
<div class="container">
    <p class="title"></p>
    <p class="result"></p>
</div>
<script src="jquery-3.2.1.js"></script>
<script src="app.js"></script>
</body>
</html>